21789724

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{495221}}^1$

素因数の和:495236

約数の個数: 12

約数和(自身を含む): 41598648

約数和(自身を除く): 19808924

約数列:

[1, 2, 4, 11, 22, 44, 495221, 990442, 1980884, 5447431, 10894862, 21789724]

約数ペア:

[(1, 21789724), (2, 10894862), (4, 5447431), (11, 1980884), (22, 990442), (44, 495221)]